All 3 Uses

dispose
in
An Enemy of the People
(Edited)

And he has put his paper at my disposal if necessity should arise.
Act 2

disposal = command
Well, the fact is that, now we know the bearings of the whole affair, we think we might venture to put the "People's Messenger" at your disposal.
Act 5
Luckily I shall have all my time at my disposal; because I have been dismissed from the Baths, you know.
Act 5 *

Definitions:

(1) (dispose as in: dispose of the waste)
to throw away
(2) (dispose as in: dispose of the matter)
to settle something so it no longer requires attention
(3) (dispose as in: dispose of the assets)
sell or transfer to another
(4) (dispose as in: disposed the troops along...)
the arrangement, positioning, or use of things
This sense of dispose can be used in the form disposal to indicate that a person can use something as they wish -- as in:
- I am at your disposal.
- She has many assets at her disposal.
(5) (dispose as in: Is she disposed to help?)
inclined (with a tendency to; or in the mood to)

This is usually seen in the form "disposed to..." or "disposed toward..."
(6) (meaning too rare to warrant focus)
Less commonly, disposing of can imply killing someone.